Assig-nob to



- tion consists in making a solution composed UNITED STATES PATENTOFFICEO JAMES S. HOWARD, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TOJAMES M. ABBOTT, OF WATEEBURY, CONNECTICUT.

ALUMINIUM-ALLOY l LATlNG SPECIFICATION forming part of Letters PatentNo. 228,900, dated June 15, 1880.

Application filed January 13, 1880. i

To all whom it may concern Be it known that I, JAMES s. HOWARD, of]Springfield, in the county of Hampden and State of Massachusetts, haveinvented a new Improvementin Electroplati n g Solutions and I do herebydeclare the following to be a full, clear, and exact description of thesame.

This invention relates to an improvement in solutions for electroplatingwith an alloy of which aluminium is the base; and the invenof cryolite,chloride of magnesium, and chloride of manganese dissolved in water, ashereinafter described. The solution is composed of one part cryolite,one part chloride of magnesium, and one part chloride of manganese,preferably combined in the form of powder. To one pound of this compoundadd about one gallon (little more or less) of water, and boil untilthoroughly dissolved.

The alloy is placed in a sack of netted or other open-Work material, andsuspended in the solution in the usual manner of suspending plates ofmetal for electroplating; or, if preferred, the granulated material maybe placed on the bottom of the lead-lined tank. In that case one pole ofthe battery must be connected to the lead lining.

I do not wish to be understood as confining myself to the exactproportions herein described for the solution,as they may be varied tosome extent without materially changing the result.

I claim- The herein-described solution for electroplating, consisting ofcryolite, chloride of magnesium, and chloride of manganese dissolved inwater, substantially as described.

JAMES S. HOWARD.

Witnesses:

J OHN E. EARLE, J 0s. 0. EARLE.

